Copyright: Creative Technology Limited


Help Contents
Sound Blaster Configuration Help

Sound Blaster Configuration allows you to update the Sound Blaster Pro settings in your DOS and Windows system files SYSTEM.INI , CONFIG.SYS  and AUTOEXEC.BAT. Your old system files will be saved with the extension B~K.

Sound Blaster Configuration will prompt you to reboot your system for the changes to take effect.

CAUTION: Base I/O address, IRQ line and DMA channel settings are not software configurable. You need to turn off your computer and change these settings by enabling or disabling appropriate jumpers on the Sound Blaster Pro audio card. Otherwise Sound Blaster Pro device drivers will report errors when your system or Windows is restarted.

Base I/O Address

IRQ

DMA Channel


Base I/O Address

I/O addresses (or I/O address range) are areas of memory used by your computer's microprocessor to distinguish among various peripheral devices connected to your system when sending or receiving data. There are several such devices on the audio card. These devices are listed below with the factory default I/O address range they occupy.

I/O Address Range	Usage
220H to 207H	Game Port
220H to 22FH	Audio Interface
388H to 38BH	FM Music Synthesizer
You can change the settings of the Audio interface. To change the setting, you need to know the interface's base I/O address.

The base I/O address is the starting address of the I/O address range. Two base I/O addresses are available for the Audio interface: 220H (factory default setting) and 240H. These settings are shown below with their I/O address range.

Base I/O Address	I/O Address Range
220H (default)	220H to 22FH
240H	240H to 24FH
Note: You need to change the  base I/O address jumper setting on the audio card manually.  Figure 2 shows two selections of jumper settings of the base I/O address on  the Sound Blaster Pro audio card. Refer to the Getting Started manual for the exact location of the jumpers that define the base I/O address.

Figure 1: Disable and enable jumper.

Figure 2: Base I/O address selection.


IRQ

The IRQ (Interrupt) line is the signal line your device uses to notify your computer's central processor that it wants to send or receive data for processing. Only the IRQ line of the Audio interface can be changed.

Four interrupts are available for the Audio interface: 2, 5 (factory default setting), 7, and 10.

Note: You need to change the IRO line jumper setting on the audio card manually. Figure 1 shows four selections of jumper settings of the IRQ line on  the Sound Blaster Pro audio card. Refer to the Getting Started manual for the exact location of the jumpers that define the IRQ line.

Figure 1: IRQ line selection.


DMA Channel

The DMA (Direct Memory Access) channel is the signal line your device uses to transfer data directly to the system's memory.

Three DMA channels are available for the Audio interface: 0, 1 (factory default setting), and 3. The DMA channel is determined by two jumpers, one for the DRQ setting and the other for the DACK setting. Both settings must be the same.

Note: You need to change the DMA channel jumper settings on the audio card manually.  Figure 1 shows three selections of jumper settings of the DMA channel on  the Sound Blaster Pro audio card. Refer to the Getting Started manual for the exact location of the jumpers that define the DMA channel.

Figure 1: DMA channel selection.